I have a 2004 A4 B6 1.9 TDI SE Avant Multitronic that a previous owner has retro-fitted with an RNS-E. He did a good job and the stereo, radio and satnav work fine. I've decided to fit a multi-function steering wheel, just the standard B6 4-spoke model but I'm struggling to find any definitive guides to help me get it together, most I've found are for fitting B7 wheels into B6s. I kept my original wheel and after a few wrong turns and money wasted I ended up with the following components ... MFSW Airbag - 8E0880201AB Steering wheel control module - 61340351 Steering wheel airbag harness - 8E0971589S Multi-function buttons wiring harness - 8Z0971589E As my car is an SE Avant it has all the stalks (indicators, wipers (incl rear wiper), trip computer and cruise. I haven't physically seen the Slip-ring but I believe it's 8E0953541E and the Steering column combination switch is 8E0953549N Today I took the airbag off and fitted the MFSW airbag with the new control module and both harnesses. I put it all back together, reconnected the battery and the buttons are dead. Plus I'm not sure if they're supposed to illuminate when the lights are on but if they do then that doesn't work either. Before I spend any more money can anyone that's already done this swap point me in the right direction please? Do I need to replace the combination switch and slip-ring to something else or do I need to do something with my VCDS-Lite to get the stereo to talk to the MFSW? It's doing my noggin in.